The test set-ups for relay tests consist of a load part, which allows the selection of specific electrical loads, and a control / monitoring part, which typically includes the measuring devices with data collection and mostly also a computer for data analysis ''<xr id="fig:Principle and sequence of testing with electronic load simulation"/> (Fig. 13.8)''. Variations for testing of different relay types concern mostly the load circuits, the sample size of test specimens, and the frequency of testing.

<figure id="fig:Principle and sequence of testing with electronic load simulation">Fig[[File:Principle and sequence of testing with electronic load simulation. 13.8:jpg|right|thumb|Principle andsequence of testingwith electronic loadsimulation]]simulation</figure>